Krebs, J.R. An Introduction to behavioural ecology / by J.R. Krebs and N.B. Davies - 2nd Edition. - Oxford : Blackwell Scientific Publications, 1981. - ix, 389 p. ; 28 cm. ISBN: 0632014989 Subjects--Topical Terms: Animal behavior; Animal ecology; Behavior evolution. Dewey Class. No.: 591.51 KRE / 686